Clamping device

Abstract

To provide a clamp device capable of suppressing unintended falling from a clamping object.SOLUTION: A shaft body 4 includes: a first end to which a movable member 5 is mounted; and a second end to which a first operation member 6 is mounted. The first operation member 6 is configured to enable an operation for rotating the shaft body 4 around the axis and an operation for axially moving the shaft body 4. A support mechanism engages with the shaft body 4 to support the shaft body 4. A disengagement mechanism acts on the support mechanism to release engagement between the support mechanism and the shaft body 4. A through hole 56 through which the shaft body 4 penetrates and a pair of arc-shaped holes 57, 58 formed around the through hole 56 are formed in the movable member 5. The disengagement mechanism includes: a pair of projections 76, 77 disposed to penetrate through the arc-shaped holes 57, 58, respectively; and a second operation member 70 enabling an operation for rotating the projections 76, 77 around the axis of the shaft body 4.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a clamping device.

Background Art

[0002] As a general clamping device, there is known one having a fixed member and a movable member to which a shaft body with a male screw is attached, and the shaft body is screwed into a female screw portion of a support member. Japanese Unexamined Patent Application Publication No. 2015-42895 (Patent Document 1) discloses a clamping device including a first operating member that rotates the shaft body around the axis, and a second operating member that releases the meshing state between the male screw portion and the female screw portion of the shaft body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the clamping device described in the above document, the meshing between the male screw portion and the female screw portion of the shaft body can be released by a simple operation of rotating the second operating member. When removing the clamping device from the object to be clamped, there is a possibility that the clamping device may fall due to gravity when the meshing between the male screw portion and the female screw portion is disengaged instantaneously when the second operating member is rotated.

[0005] The present disclosure proposes a clamping device capable of suppressing unintentional dropping from an object to be clamped.

Means for Solving the Problems

[0006] According to the present disclosure, there is proposed a clamping device including a fixing member and a movable member that can reciprocate relative to the fixing member so as to approach and separate from the fixing member, and clamping an object to be fixed by the fixing member and the movable member. The clamping device includes a shaft body, a first operation member, a support mechanism, and an engagement release mechanism. The shaft body has a first end to which the movable member is attached and a second end opposite to the first end. The first operation member is attached to the second end of the shaft body. The first operation member is configured to be able to perform an operation of rotating the shaft body around the axis and an operation of moving the shaft body in the axial direction. The support mechanism supports the shaft body by meshing with the shaft body. The engagement release mechanism acts on the support mechanism to release the engagement between the support mechanism and the shaft body. A through hole through which the shaft body penetrates and a pair of hole portions formed around the through hole are formed in the movable member. The engagement release mechanism has a pair of convex portions respectively penetrating through the hole portions and a second operation member capable of rotating the convex portions around the axis of the shaft body.

[0007] In the above clamping device, the engagement release mechanism may be configured to be axially movable integrally with the shaft body by an operation of the first operation member.

[0008] In the above clamping device, the hole portions may be arc-shaped holes extending in the circumferential direction around the axis of the shaft body, and the convex portions may have an arc-shaped shape extending in the circumferential direction.

[0009] In the above clamping device, the convex portions may be formed with a circumferential dimension smaller than that of the arc-shaped holes.

[0010] In the above clamping device, the convex portions may have a shape capable of surface contact with the object to be fixed.

[0011] In the above clamping device, the convex portions may have a tip curved surface with a concave tip.

Advantages of the Invention

[0012] According to the clamping device according to the present disclosure, unintentional dropping from the object to be clamped can be suppressed.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0014] Hereinafter, embodiments will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed descriptions thereof will not be repeated.

[0015] FIG. 1 is a front view showing the configuration of the infusion pump device 100. FIG. 2 is a perspective view of the clamp device 101 according to the embodiment. As shown in FIG. 1, the clamp device 101 is a device for fixing the infusion pump main body 102 to an object to be fixed (clamping target) 200. The infusion pump main body 102 is, for example, a syringe pump. The object to be fixed 200 is, for example, a cylindrical pole. The infusion pump device 100 is, for example, a syringe pump unit including the clamp device 101 and a syringe pump fixed to the clamp device 101.

[0016] As shown in FIGS. 1 and 2, the clamp device 101 mainly includes a fixed member 1, a mounting member 2, a shaft body 4, a movable member 5, a first operating member 6, and an engagement release mechanism 7.

[0017] The fixed member 1 has a support portion 11, a receiving portion 12, and a connecting portion 13. The shaft body 4 passes through the support portion 11. Inside the support portion 11, a support mechanism 3 (not shown in FIGS. 1 and 2) is disposed, and the shaft body 4 is supported by the support mechanism 3. The receiving portion 12 has a receiving surface 14 for receiving the object to be fixed 200. The receiving surface 14 corresponds to the shape of the object to be fixed 200. The receiving surface 14 has a cylindrical concave shape corresponding to the outer peripheral surface of a cylindrical pole.

[0018] The connecting portion 13 connects the support portion 11 and the receiving portion 12. The support portion 11 is connected to the first end of the connecting portion 13, and the receiving portion 12 is connected to the second end of the connecting portion 13. The fixed member 1 is formed in a substantially angular C shape in a front view shown in FIG. 1. The support portion 11 extends substantially perpendicular to the connecting portion 13. The receiving portion 12 extends substantially perpendicular to the connecting portion 13. The support portion 11 and the receiving portion 12 are arranged to face each other. The support portion 11, the receiving portion 12, and the connecting portion 13 may be formed as a part of the same member as shown in FIG. 1, or may be formed as separate members.

[0019] The mounting member 2 is fixed to the fixed member 1. Typically, the mounting member 2 is fixed to the connecting portion 13. The infusion pump main body 102 is attached to the mounting member 2 of the clamp device 101. The infusion pump device 100 is fixed to the clamp device 101 via the mounting member 2. At least a part of the mounting member 2 and the fixed member 1 may be formed as one member. The mounting member 2 may be formed as a part of the infusion pump main body 102.

[0020] The shaft body 4 extends along the connecting portion 13 of the fixed member 1. A movable member 5 is attached to the tip of the shaft body 4. A first operating member 6 is attached to the proximal end of the shaft body 4. The shaft body 4 has a first end to which the movable member 5 is attached and a second end on the axially opposite side of the first end, and the first operating member 6 is attached to the second end. The movable member 5 is disposed between the support portion 11 and the receiving portion 12 of the fixed member 1. The movable member 5 is disposed so as to face the receiving surface 14.

[0021] By operating to rotate the first operating member 6, it is possible to rotate the shaft body 4 around its axis. By operating to move the first operating member 6 in the axial direction of the shaft body 4, it is possible to move the shaft body 4 in the axial direction and relatively move the movable member 5 axially with respect to the fixed member 1. Thereby, it is possible to change the distance between the movable member 5 and the receiving portion 12. The movable member 5 is configured to be relatively reciprocally movable with respect to the receiving portion 12 so as to approach and separate from the receiving portion 12 of the fixed member 1.

[0022] The engagement release mechanism 7 is a configuration for releasing the engaged state between the support mechanism 3 and the shaft body 4. The assembly including the shaft body 4, the movable member 5, the first operating member 6, and the engagement release mechanism 7 is relatively movable with respect to the fixed member 1 and the mounting member 2. More specifically, the assembly is integrally relatively reciprocally movable in the axial direction of the shaft body 4 and integrally relatively rotatable around the axis of the shaft body 4 with respect to the fixed member 1 and the mounting member 2.

[0023] FIG. 3 is a perspective view showing a partial configuration of the clamping device 101 extending from the first operating member 6 to the movable member 5. FIG. 3 shows the above-described assembly including the shaft body 4, the movable member 5, the first operating member 6, and the engagement release mechanism 7. The engagement release mechanism 7 has a second operating member 70 and an engagement release member 71. FIG. 4 is a perspective view of the engagement release member 71.

[0024] As shown in FIG. 4, the meshing release member 71 has an engaging portion 72 at one end. As shown in FIG. 3, the engaging portion 72 is disposed inside the second operating member 70, and the engaging portion 72 of the meshing release member 71 is engaged with the second operating member 70. A part of the outer peripheral surface of the engaging portion 72 is formed in a flat shape. The second operating member 70 and the meshing release member 71 are configured to be integrally rotatable around the axis of the shaft body 4. The second operating member 70 is a component different from the first operating member 6 and can be operated independently of the first operating member 6. The shaft body 4 extends through the second operating member 70 and the engaging portion 72.

[0025] The meshing release member 71 has a pair of pressing portions 73, 74 formed in a rod shape. The meshing release member 71 has a ring portion 75 and convex portions 76, 77 at the other end. The pair of pressing portions 73, 74 extend in the axial direction of the shaft body 4 and connect the engaging portion 72 and the ring portion 75. One end of the pressing portions 73, 74 is fixed to the engaging portion 72, and the other end of the pressing portions 73, 74 is fixed to the ring portion 75. As shown in FIG. 3, the meshing release member 71 is disposed around the shaft body 4 such that the shaft body 4 is sandwiched between the pressing portion 73 and the pressing portion 74. The pressing portions 73, 74 are disposed parallel to the shaft body 4.

[0026] The ring portion 75 has a ring-shaped plate shape. The pressing portions 73, 74 are fixed to one surface of the ring portion 75. The shaft body 4 extends through the ring portion 75. The convex portions 76, 77 protrude from the other surface of the ring portion 75.

[0027] The convex portions 76 and 77 extend in the axial direction of the shaft body 4. The convex portions 76 and 77 are formed along the outer peripheral edge of the ring portion 75 and have an arc shape when viewed in the axial direction of the shaft body 4. The convex portion 76 has a tip curved surface 78 at its tip. The convex portion 77 has a tip curved surface 79 at its tip. The tip curved surfaces 78 and 79 have a concave curved shape. Typically, the tip curved surfaces 78 and 79 have a shape that forms a part of a cylindrical surface. When the object to be fixed 200 is a cylindrical pole, the tip curved surfaces 78 and 79 have a shape corresponding to the outer peripheral surface of the pole. The tip curved surfaces 78 and 79 have a shape that can be in surface contact with the cylindrical surface of the outer periphery of the pole.

[0028] Figure 5 is a perspective view of the movable member 5. As shown in Figure 5, the movable member 5 has a plate-shaped base plate 51 and plate-shaped side plates 52 and 54. The side plates 52 and 54 are fixed to the edge of the base plate 51. The side plates 52 and 54 extend in the thickness direction of the base plate 51. The side plates 52 and 54 project in the same direction with respect to the base plate 51. The base plate 51 has a substantially rectangular plate shape, and the side plate 52 is fixed to one of a pair of opposite sides of the rectangle, and the side plate 54 is fixed to the other.

[0029] The side plate 52 has a clamping surface 53 at its tip. The side plate 54 has a clamping surface 55 at its tip. The clamping surfaces 53 and 55 have a concave curved shape. The clamping surfaces 53 and 55 correspond to the shape of the object to be fixed 200. Typically, the clamping surfaces 53 and 55 have a concave shape that forms a part of a cylindrical surface corresponding to the outer peripheral surface of a cylindrical pole. As shown in Figure 1, the clamping surfaces 53 and 55 are arranged to face the receiving surface 14 of the fixing member 1. The object to be fixed 200 is arranged between the receiving surface 14 and the clamping surfaces 53 and 55, and the object to be fixed 200 can be clamped by the receiving surface 14 and the clamping surfaces 53 and 55.

[0030] The base plate 51 is formed with a circular through-hole 56 that penetrates the base plate 51 in the thickness direction. The base plate 51 is formed with curved arc-shaped holes 57 and 58 that penetrate the base plate 51 in the thickness direction. The arc-shaped holes 57 and 58 are formed around the through-hole 56. The through-hole 56 is formed between the arc-shaped holes 57 and 58, and the through-hole 56 is sandwiched by the pair of arc-shaped holes 57 and 58. The arc-shaped holes 57 and 58 are formed in a concentric arc shape with the through-hole 56. The arc-shaped hole 57 has substantially the same curvature as the convex portion 76 of the engagement release member 71. The arc-shaped hole 58 has substantially the same curvature as the convex portion 77 of the engagement release member 71.

[0031] As shown in FIG. 3, the tip portion 43 of the shaft body 4 penetrates the through-hole 56, whereby the shaft body 4 and the movable member 5 are integrally assembled. The rod-shaped locking member 48 is attached to the tip portion 43 of the shaft body 4 that has penetrated the through-hole 56 so as to penetrate the tip portion 43 in the radial direction of the shaft body 4. Thereby, the shaft body 4 and the movable member 5 are surely assembled integrally. The arc-shaped holes 57 and 58 formed in the movable member 5 extend in the circumferential direction around the axis of the shaft body 4.

[0032] The convex portion 76 of the engagement release member 71 extends in the circumferential direction around the axis of the shaft body 4 and is disposed within the arc-shaped hole 57. The convex portion 77 of the engagement release member 71 extends in the circumferential direction around the axis of the shaft body 4 and is disposed within the arc-shaped hole 58. The convex portion 76 is disposed so as to penetrate the arc-shaped hole 57. The convex portion 77 is disposed so as to penetrate the arc-shaped hole 58. The convex portions 76 and 77 protrude from the base plate 51 of the movable member 5 more than the tip portion 43 of the shaft body 4. As shown in FIG. 2, the convex portions 76 and 77 are disposed to face the receiving surface 14 of the fixing member 1. Referring also to FIG. 1, the convex portions 76 and 77 are disposed to face the object to be fixed 200.

[0033] In the circumferential direction around the axis of the shaft body 4, the length of the convex portion 76 is made smaller than the length of the arcuate hole 57. A gap is formed between the end portion of the convex portion 76 and the end portion of the arcuate hole 57 in the circumferential direction. The convex portion 76 is movable relative to the arcuate hole 57 in the circumferential direction. In the circumferential direction around the axis of the shaft body 4, the length of the convex portion 77 is made smaller than the length of the arcuate hole 58. A gap is formed between the convex portion 77 and the arcuate hole 58 in the circumferential direction. The convex portion 77 is movable relative to the arcuate hole 58 in the circumferential direction.

[0034] FIG. 6 is a cross-sectional view showing the clamping device 101 in the engaged state. As described above with reference to FIG. 1, the support mechanism 3 is disposed inside the support portion 11 of the fixed member 1. FIG. 6 shows a cross-section taken along line VI-VI in FIG. 1. The support mechanism 3 is disposed between the first end and the second end of the shaft body 4 and supports the shaft body 4 at a position between the first end and the second end. The support mechanism 3 includes a rectangular parallelepiped housing 30. Inside the housing 30, a hollow internal space surrounded by two pairs of opposing inner wall surfaces is formed. The inner wall surfaces of the housing 30 have a first wall surface 301 and a second wall surface 302 that oppose each other in the longitudinal direction of the housing 30.

[0035] In the internal space of the housing 30, two female screw members 31, 32 and two elastic members 33, 34 are disposed to support the shaft body 4. The female screw members 31, 32 are separate members and are disposed apart from each other around the axis of the shaft body 4. The female screw member 31 is supported by a shaft portion 311 and is rotatable about the shaft portion 311. The female screw member 32 is supported by a shaft portion 331 and is rotatable about the shaft portion 331.

[0036] On the outer peripheral surface of the shaft body 4, a male screw surface 41 is formed. The male screw surface 41 may be formed over the entire shaft body 4 in the axial direction, or may be formed on a part of the shaft body 4. The female screw member 31 has a female screw surface 314 facing the shaft body 4 side. The female screw member 32 has a female screw surface 334 facing the shaft body 4 side. When the female screw member 31 rotates about the shaft portion 311, the female screw surface 314 approaches or separates from the male screw surface 41. When the female screw member 32 rotates about the shaft portion 331, the female screw surface 334 approaches or separates from the male screw surface 41.

[0037] On the female screw member 31, a recessed portion 312 is formed on the surface on the side opposite to the female screw surface 314, that is, the side facing the first wall surface 301, where the surface is recessed. An elastic member 33 is accommodated in the recessed portion 312. The elastic member 33 has a first end that abuts against the first wall surface 301 and a second end that abuts against the bottom surface of the recessed portion 312. The elastic member 33 biases the female screw member 31 in the direction approaching the shaft body 4. The female screw member 31 shown in FIG. 6 is arranged at the position closest to the shaft body 4 by the elastic force of the elastic member 33. At this time, the female screw surface 314 of the female screw member 31 meshes with the male screw surface 41 of the shaft body 4.

[0038] On the female screw member 32, a recessed portion 332 is formed on the surface on the side opposite to the female screw surface 334, that is, the side facing the second wall surface 302, where the surface is recessed. An elastic member 34 is accommodated in the recessed portion 332. The elastic member 34 has a first end that abuts against the second wall surface 302 and a second end that abuts against the bottom surface of the recessed portion 332. The elastic member 34 biases the female screw member 32 in the direction approaching the shaft body 4. The female screw member 32 shown in FIG. 6 is arranged at the position closest to the shaft body 4 by the elastic force of the elastic member 34. At this time, the female screw surface 334 of the female screw member 32 meshes with the male screw surface 41 of the shaft body 4.

[0039] The elastic members 33 and 34 are supported by the housing 30. The elastic member 33 is supported by the first wall surface 301. The elastic member 34 is supported by the second wall surface 302. The elastic members 33 and 34 may each be any biasing member that applies a biasing force to the female screw members 31 and 32. The elastic members 33 and 34 may be springs. The elastic members 33 and 34 may be compression coil springs. The elastic members 33 and 34 are each configured to be deformable in accordance with the movement of the female screw members 31 and 32.

[0040] The support mechanism 3 has a plurality of female screw members 31 and 32 that mesh with the male screw surface 41 of the shaft body 4. The support mechanism 3 has a plurality of elastic members 33 and 34 that press the female screw members 31 and 32 toward the male screw surface 41. The support mechanism 3 supports the shaft body 4 by meshing with the shaft body 4.

[0041] The pressing portions 73 and 74 of the engagement release member 71 described above are disposed so as to penetrate the support mechanism 3 in the axial direction. In the engaged state where the female screw surfaces 314 and 334 mesh with the male screw surface 41 shown in FIG. 6, the pressing portions 73 and 74 are disposed between the female screw members 31 and 32 in the circumferential direction around the axis of the shaft body 4. In the engaged state, the engagement release member 71 is disposed such that the pressing portions 73 and 74 are not in contact with both of the female screw members 31 and 32.

[0042] FIG. 7 is a cross-sectional view showing the clamp device 101 in the disengaged state. In FIG. 7, a cross-section along the line VII-VII in FIG. 1, which is the same as in FIG. 6, is shown. As described with reference to FIGS. 3 and 4, the second operating member 70 is engaged with the engaging portion 72 of the engagement release member 71, and the second operating member 70 and the engagement release member 71 are integrally rotatable around the axis of the shaft body 4. The first operating member 6 is rotatable integrally with the shaft body 4, while the second operating member 70 is provided so as not to be engaged with the shaft body 4 and is configured not to interfere with the operation of the shaft body 4. Therefore, even if the second operating member 70 is rotated, the shaft body 4 is independent of the second operating member 70, and thus the shaft body 4 does not rotate.

[0043] In the axial direction of the shaft body 4, the first operating member 6 and the second operating member 70 are arranged adjacent to each other. The first operating member 6 and the second operating member 70 are arranged such that the second operating member 70 can be operated with the hand holding the first operating member 6. Thus, the first operating member 6 and the second operating member 70 can be operated with one hand. The second operating member 70 is arranged closer to the support portion 11 of the fixing member 1 than the first operating member 6.

[0044] By rotating the second operating member 70 around the shaft body 4, a force is applied to the engagement release member 71, causing the engagement release member 71 to rotate. As shown in FIG. 7, the pressing portion 73 that rotates around the axis of the shaft body 4 abuts against the female screw member 32 and presses the female screw member 32, so that the female screw member 32 rotates in the counterclockwise direction in the figure around the shaft portion 331. The pressing portion 74 that rotates around the axis of the shaft body 4 abuts against the female screw member 31 and presses the female screw member 31, so that the female screw member 31 rotates in the counterclockwise direction in the figure around the shaft portion 311.

[0045] When the engagement release mechanism 7 acts on the support mechanism 3, the female screw surface 314 of the female screw member 31 and the female screw surface 334 of the female screw member 32 are separated from the male screw surface 41 of the shaft body 4, resulting in an engagement release state. Since the engagement between the support mechanism 3 and the shaft body 4 is released, the shaft body 4 can move axially without being restricted by the female screw members 31 and 32. The first wall surface 301 defines the rotational movement range of the female screw member 31. The second wall surface 302 defines the rotational movement range of the female screw member 32.

[0046] As shown in FIGS. 3 to 5, the convex portions 76 and 77 at the tip of the engagement release member 71 are formed with a smaller circumferential dimension than the arc-shaped holes 57 and 58 formed in the movable member 5. By rotating the engagement release member 71, the convex portions 76 and 77 also rotate around the axis. Since a gap is formed between the convex portion 76 and the arc-shaped hole 57 and a gap is formed between the convex portion 77 and the arc-shaped hole 58, interference between the convex portions 76 and 77 and the movable member 5 is avoided. Therefore, the rotation of the engagement release member 71 is configured not to affect the arrangement of the movable member 5.

[0047] FIG. 8 is a front view showing a clamp device 101 attached to an object to be fixed 200. As shown in FIG. 8, the clamp device 101 is attached to the object to be fixed 200 by sandwiching the object to be fixed 200 between a fixed member 1 and a movable member 5. More specifically, the object to be fixed 200 is sandwiched between the receiving surface 14 of the receiving portion 12 of the fixed member 1 and the sandwiching surfaces 53, 55 of the side plates 52, 54 of the movable member 5.

[0048] A pair of arcuate holes 57, 58 are formed in the movable member 5, and the convex portions 76, 77 at the tip of the engagement release member 71 penetrate through the arcuate holes 57, 58 respectively and protrude from the base plate 51 of the movable member 5. In a state where the clamp device 101 is attached to the object to be fixed 200, the tip curved surfaces 78, 79 of the convex portions 76, 77 are in surface contact with the object to be fixed 200 so as to sandwich the object to be fixed 200.

[0049] When the convex portions 76, 77 abut against the object to be fixed 200, the rotation of the engagement release member 71 around the axis of the shaft body 4 is hindered. Therefore, in a state where the clamp device 101 is attached to the object to be fixed 200, it is configured such that the second operating member 70 cannot be rotated to an engagement release state.

[0050] FIG. 9 is a front view showing the clamp device 101 during the operation of removing it from the object to be fixed 200. In the state where the clamp device 101 shown in FIG. 8 is attached to the object to be fixed 200, by rotating the first operating member 6, the shaft body 4 moves in the axial direction due to the screw action between the male screw surface 41 of the shaft body 4 in the engaged state and the female screw surfaces 314, 334 of the female screw members 31, 32. The entire assembly including the shaft body 4, the movable member 5, the first operating member 6, and the engagement release mechanism 7 is moved in the axial direction and separated from the object to be fixed 200. The assembly is separated from the object to be fixed 200 until the convex portions 76, 77 at the tip of the engagement release member 71 reach a position where they no longer sandwich the object to be fixed 200.

[0051] When the engagement release member 71 moves away from the object 200 to be fixed and the rotation of the engagement release member 71 is no longer hindered by the object 200 to be fixed, the engagement release member 71 can be rotated by operating the second operating member 70. By a simple operation of rotating the second operating member 70, the engagement state between the support mechanism 3 and the shaft body 4 is released to an engagement release state. In that state, the first operating member 6 is gripped and the assembly is moved in the axial direction away from the object 200 to be fixed. Thereby, the clamping device 101 can be removed from the object 200 to be fixed.

[0052] As described above, in the clamping device 101 of the embodiment, as shown in FIG. 5, a pair of arcuate holes 57, 58 are formed around the through hole 56 in the movable member 5. As shown in FIG. 3, the engagement release mechanism 7 has a pair of convex portions 76, 77 disposed through the pair of arcuate holes 57, 58 respectively.

[0053] In the state where the clamping device 101 shown in FIG. 8 is attached to the object 200 to be fixed, the pair of convex portions 76, 77 are in contact with the object 200 to be fixed. Thereby, the rotation of the engagement release member 71 is restricted. Since the operation of rotating the second operating member 70 is restricted, the clamping device 101 cannot be brought into an engagement release state while being attached to the object 200 to be fixed. In the engagement release state, the distance between the receiving portion 12 of the fixing member 1 and the movable member 5 can be greatly varied, but since the engagement release state cannot be achieved, an operation of gradually widening the distance between the receiving portion 12 and the movable member 5 will be performed. The operator who notices that the clamping of the object 200 by the receiving portion 12 and the movable member 5 has started to loosen can appropriately support the clamping device 101 and / or the infusion pump main body 102. Therefore, it is possible to prevent the clamping device 101 from falling due to its own weight.

[0054] As shown in FIGS. 8 and 9, the engagement release mechanism 7 may be configured to be axially movable integrally with the shaft body 4 by the operation of the first operating member 6. From the state where the clamping device 101 is attached to the object 200 to be fixed, by operating the first operating member 6, the engagement release mechanism 7 can be moved away from the object 200 to be fixed. When the convex portions 76 and 77 of the engagement release mechanism 7 are separated from the object 200 to be fixed, the engagement release member 71 can rotate freely. In this state, when the engagement is released and the distance between the receiving portion 12 of the fixing member 1 and the movable member 5 is increased, the clamping device 101 can be quickly removed from the object 200 to be fixed.

[0055] As shown in FIG. 3, the arcuate holes 57 and 58 may extend in the circumferential direction around the axis of the shaft body 4, and the convex portions 76 and 77 may have an arcuate shape extending in the circumferential direction. By adopting such a shape, the engagement release member 71 including the convex portions 76 and 77 can be rotated in the circumferential direction.

[0056] As shown in FIG. 3, the convex portions 76 and 77 may be formed such that their circumferential dimensions are smaller than those of the arcuate holes 57 and 58. Thereby, when changing from the engaged state shown in FIG. 6 to the disengaged state shown in FIG. 7, the rotation of the engagement release member 71 can be prevented from being obstructed by the movable member 5, so that the engagement release member 71 can be surely rotated to disengage the support mechanism 3 from the shaft body 4.

[0057] As shown in FIG. 8, the convex portions 76 and 77 may have a shape capable of surface contact with the object 200 to be fixed. In this way, in the state where the clamping device 101 is attached to the object 200 to be fixed, the convex portions 76 and 77 can be surely brought into contact with the object 200 to be fixed, and the rotation of the engagement release member 71 can be restricted.

[0058] As shown in FIG. 4, the convex portions 76 and 77 may have tip curved surfaces 78 and 79 whose tips are curved in a concave shape. In this way, convex portions 76 and 77 having a shape adapted to the object 200 to be fixed, which is a cylindrical pole, can be realized.

[0059] The clamping device 101 of the embodiment is not limited to an example in which it is used for the infusion pump device 100 to fix the infusion pump main body 102 to the object to be fixed 200, and can be used to fix various objects to the object to be fixed.

[0060] Although the embodiments have been described as above, it should be considered that the embodiments disclosed this time are illustrative in all respects and not restrictive. The scope of this invention is shown not by the above description but by the claims, and is intended to include meanings equivalent to the claims and all modifications within the scope.

Explanation of Reference Numerals

[0061] 1 fixing member, 2 mounting member, 3 support mechanism, 4 shaft body, 5 movable member, 6 first operating member, 7 engagement release mechanism, 11 support portion, 12 receiving portion, 13 connecting portion, 14 receiving surface, 30 housing, 31, 32 female screw member, 33, 34 elastic member, 41 male screw surface, 43 tip portion, 48 locking member, 51 base plate, 52, 54 side plates, 53, 55 clamping surfaces, 56 through hole, 57, 58 arc-shaped hole, 70 second operating member, 71 engagement release member, 72 engaging portion, 73, 74 pressing portions, 75 ring portion, 76, 77 convex portions, 78, 79 tip curved surfaces, 100 infusion pump device, 101 clamping device, 102 infusion pump main body, 200 object to be fixed, 301 first wall surface, 302 second wall surface, 311, 331 shaft portions, 312, 332 recessed portions, 314, 334 female screw surfaces.

Claims

1. A clamping device comprising a fixing member and a movable member that can reciprocate relative to the fixing member so as to approach and separate from the fixing member, and clamping an object to be fixed by the fixing member and the movable member, a shaft body having a first end to which the movable member is attached and a second end opposite to the first end, a first operation member attached to the second end and capable of operating to rotate the shaft body around the axis and move the shaft body in the axial direction, a support mechanism that meshes with the shaft body to support the shaft body, and a meshing release mechanism that acts on the support mechanism to release the meshing between the support mechanism and the shaft body. The movable member is formed with a through hole through which the shaft body passes and a pair of hole portions formed around the through hole. The meshing release mechanism includes a pair of convex portions disposed through the hole portions respectively, and a second operation member capable of operating to rotate the convex portions around the axis of the shaft body.

2. The meshing release mechanism is configured to be axially movable integrally with the shaft body by the operation of the first operation member. The clamping device according to claim 1.

3. The hole portion is an arc-shaped hole extending in the circumferential direction around the axis of the shaft body. The convex portion has an arc-shaped shape extending in the circumferential direction. The clamping device according to claim 1 or claim 2.

4. The convex portion is formed such that the dimension in the circumferential direction is smaller than that of the arc-shaped hole. The clamping device according to claim 3.

5. The convex portion has a shape capable of making surface contact with the object to be fixed. The clamping device according to any one of claims 1 to 4.

6. The convex portion has a tip curved surface with a concave tip. The clamping device according to claim 5.

Images